The XO Project is an international team of amateur and professional astronomers tasked with identifying extrasolar planets.
[2][3] Preliminary identification of possible star candidates starts at the Haleakala telescope in Hawaii by a team of professional astronomers.
Once enough data is collected, it is forwarded to the University of Texas McDonald Observatory to confirm the presence of a transiting planet by a second team of professional astronomers.
[1] Their first discovery of a Jupiter-sized planet orbiting a Sun-like star 600 light-years from Earth in the constellation Corona Borealis—XO-1b—was reported May 16, 2006 on Newswise.
[5] The XO telescope has discovered six objects so far, five are hot Jupiter planets and one, XO-3b, may be a brown dwarf.